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HOMESERVICE MANUALSBUICK2013REGAL TURBO PREMIUM, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 119 (AUTOMATIC TRANSMISSION - 6T45 - REPAIR INSTRUCTIONS - OFF VEHICLE)REPAIR INSTRUCTIONS - OFF VEHICLE3-5-REVERSE AND 4-5-6 CLUTCH HOUSING DISASSEMBLE (6T40/45)4-5-6 CLUTCH PISTON REMOVAL
2013 Buick Regal Turbo Premium, Standard Trans

4-5-6 Clutch Piston Removal

2013 Buick Regal Turbo Premium, Standard TransSECTION 4-5-6 Clutch Piston Removal
WARNING: This page is about a different car, the 2011 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: 4-5-6 Clutch Piston Components
GM1891342Courtesy of GENERAL MOTORS CORP.
4-5-6 Clutch Piston Removal

Callout Component Name
1 4-5-6 Clutch Dam Retaining Ring
Tip:  The 4-5-6 clutch dam retaining ring is not reusable.

Special Tools

  • DT-47951-2:  Spring Compressor
  • GE 5586-A:  Snap Ring Pliers or equivalent

For equivalent regional tools, refer to Special Tools .
2 4-5-6 Clutch Piston Fluid Dam Assembly

Procedure

  1. Place the 3-5 reverse and 4-5-6 clutch housing onto the support hub in the case.
  2. Apply shop air to the 4-5-6 clutch feed hole using a rubber tipped air gun to dislodge the dam piston and the 4-5-6 clutch piston from the clutch housing.
3 4-5-6 Clutch Piston Return Spring Assembly
4 4-5-6 Clutch Piston
Tip:  Apply shop air to the 4-5-6 clutch feed hole using a rubber tipped air gun to dislodge the clutch piston.
5 4-5-6 Clutch Piston Inner Seal
6 4-5-6 Clutch Piston Outer Seal (Dark Blue) (Stepped)
7 4-5-6 Clutch Piston Outer Seal (Large) (Rounded)
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.